Pith Number

pith:JHACQ5JG

pith:2009:JHACQ5JGWY27QAZSCRL7YM4P3P

not attested not anchored not stored refs pending

Non-convexly constrained linear inverse problems

Thomas Blumensath

arxiv:0911.5098 v1 · 2009-11-26 · math.NA · cs.NA

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{JHACQ5JGWY27QAZSCRL7YM4P3P}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-06-03T23:06:30.949575Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

49c0287526b635f803321457fc338fdbc6fc4870d7afe1f1eea866b33ba812eb

Aliases

arxiv: 0911.5098 · arxiv_version: 0911.5098v1 · doi: 10.48550/arxiv.0911.5098 · pith_short_12: JHACQ5JGWY27 · pith_short_16: JHACQ5JGWY27QAZS · pith_short_8: JHACQ5JG

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/JHACQ5JGWY27QAZSCRL7YM4P3P \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 49c0287526b635f803321457fc338fdbc6fc4870d7afe1f1eea866b33ba812eb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4df4892585d122c817fcd6729f75df8b4cb60ddaa5ffd363549a1c7c152ae626",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2009-11-26T15:17:01Z",
    "title_canon_sha256": "0d06515e6c874970c8623022f77063e002f133416c7b3c94bc656531b67d11a9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0911.5098",
    "kind": "arxiv",
    "version": 1
  }
}